.container{
    display: flex;
    .nav-left{
        width:15%;
        min-width: 180px;
        background-color:#001529
    }
    .main{
        flex: 1;
        background: #f1f3f5;
    }
    .content{
        position: relative;
        width: 100%;
        padding: 20px;
    }
}